/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:46:30,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:46:30,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:46:30,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:46:30,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:46:30,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:46:30,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:46:30,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:46:30,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:46:30,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:46:30,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:46:30,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:46:30,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:46:30,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:46:30,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:46:30,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:46:30,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:46:30,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:46:30,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:46:30,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:46:30,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:46:30,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:46:30,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:46:30,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:46:30,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:46:30,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:46:30,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:46:30,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:46:30,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:46:30,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 00:46:30,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 00:46:30,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 00:46:30,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 00:46:30,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 00:46:30,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 00:46:30,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 00:46:30,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 00:46:30,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 00:46:30,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:46:30,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:46:30,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:46:30,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 00:46:30,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:46:30,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:46:30,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:46:30,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:46:30,920 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:46:30,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:46:30,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:46:30,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:46:30,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:46:30,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:46:30,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:46:30,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:46:30,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:46:30,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:46:30,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:46:30,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:46:30,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:30,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:46:30,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:46:30,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:46:30,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:46:30,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:46:30,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:46:30,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:46:30,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:46:31,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:46:31,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:46:31,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:46:31,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:46:31,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:46:31,290 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 00:46:31,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdeeb0537/5d4ff05e75534195b7710307f2901f76/FLAGcc33a8b27 [2020-08-22 00:46:32,045 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:46:32,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 00:46:32,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdeeb0537/5d4ff05e75534195b7710307f2901f76/FLAGcc33a8b27 [2020-08-22 00:46:32,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdeeb0537/5d4ff05e75534195b7710307f2901f76 [2020-08-22 00:46:32,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:46:32,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:46:32,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:32,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:46:32,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:46:32,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:32" (1/1) ... [2020-08-22 00:46:32,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a0aa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:32, skipping insertion in model container [2020-08-22 00:46:32,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:32" (1/1) ... [2020-08-22 00:46:32,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:46:32,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:46:33,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:33,870 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:46:34,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:34,831 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:46:34,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34 WrapperNode [2020-08-22 00:46:34,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:34,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:46:34,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:46:34,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:46:34,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:46:35,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:46:35,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:46:35,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:46:35,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:46:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:46:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 00:46:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 00:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 00:46:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 00:46:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 00:46:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 00:46:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 00:46:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 00:46:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 00:46:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 00:46:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 00:46:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 00:46:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 00:46:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 00:46:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 00:46:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:46:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:46:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:46:38,260 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:46:38,260 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 00:46:38,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:38 BoogieIcfgContainer [2020-08-22 00:46:38,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:46:38,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:46:38,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:46:38,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:46:38,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:46:32" (1/3) ... [2020-08-22 00:46:38,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bf63ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:38, skipping insertion in model container [2020-08-22 00:46:38,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (2/3) ... [2020-08-22 00:46:38,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bf63ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:38, skipping insertion in model container [2020-08-22 00:46:38,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:38" (3/3) ... [2020-08-22 00:46:38,289 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-22 00:46:38,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:46:38,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-08-22 00:46:38,329 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-08-22 00:46:38,363 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:46:38,363 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:46:38,363 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:46:38,363 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:46:38,363 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:46:38,364 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:46:38,364 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:46:38,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:46:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states. [2020-08-22 00:46:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 00:46:38,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:38,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:38,471 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times [2020-08-22 00:46:38,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:38,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853087230] [2020-08-22 00:46:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:40,220 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 00:46:40,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853087230] [2020-08-22 00:46:40,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:40,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:40,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943873982] [2020-08-22 00:46:40,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:40,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:40,389 INFO L87 Difference]: Start difference. First operand 1016 states. Second operand 4 states. [2020-08-22 00:46:41,001 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-22 00:46:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:48,540 INFO L93 Difference]: Finished difference Result 1776 states and 3147 transitions. [2020-08-22 00:46:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:48,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-08-22 00:46:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:48,579 INFO L225 Difference]: With dead ends: 1776 [2020-08-22 00:46:48,579 INFO L226 Difference]: Without dead ends: 1481 [2020-08-22 00:46:48,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-22 00:46:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479. [2020-08-22 00:46:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1479 states. [2020-08-22 00:46:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions. [2020-08-22 00:46:48,737 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324 [2020-08-22 00:46:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:48,739 INFO L479 AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions. [2020-08-22 00:46:48,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions. [2020-08-22 00:46:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 00:46:48,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:48,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:48,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:46:48,750 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times [2020-08-22 00:46:48,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:48,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019880898] [2020-08-22 00:46:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:49,898 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 00:46:49,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:50,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019880898] [2020-08-22 00:46:50,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:50,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:50,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341946997] [2020-08-22 00:46:50,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:50,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:50,205 INFO L87 Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 4 states. [2020-08-22 00:46:51,003 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-22 00:46:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:58,022 INFO L93 Difference]: Finished difference Result 2852 states and 4423 transitions. [2020-08-22 00:46:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:58,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-08-22 00:46:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:58,046 INFO L225 Difference]: With dead ends: 2852 [2020-08-22 00:46:58,047 INFO L226 Difference]: Without dead ends: 2439 [2020-08-22 00:46:58,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2020-08-22 00:46:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437. [2020-08-22 00:46:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2020-08-22 00:46:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions. [2020-08-22 00:46:58,190 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324 [2020-08-22 00:46:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:58,193 INFO L479 AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions. [2020-08-22 00:46:58,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions. [2020-08-22 00:46:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 00:46:58,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:58,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:46:58,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:46:58,223 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times [2020-08-22 00:46:58,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:58,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634786323] [2020-08-22 00:46:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:59,417 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 00:46:59,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:59,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634786323] [2020-08-22 00:46:59,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:59,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:46:59,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402753050] [2020-08-22 00:46:59,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:46:59,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:46:59,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:59,612 INFO L87 Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 5 states. [2020-08-22 00:47:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:09,475 INFO L93 Difference]: Finished difference Result 7199 states and 11086 transitions. [2020-08-22 00:47:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:47:09,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-22 00:47:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:09,499 INFO L225 Difference]: With dead ends: 7199 [2020-08-22 00:47:09,499 INFO L226 Difference]: Without dead ends: 4777 [2020-08-22 00:47:09,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:47:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-08-22 00:47:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653. [2020-08-22 00:47:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4653 states. [2020-08-22 00:47:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions. [2020-08-22 00:47:09,685 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324 [2020-08-22 00:47:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:09,686 INFO L479 AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions. [2020-08-22 00:47:09,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:47:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions. [2020-08-22 00:47:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:47:09,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:09,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:47:09,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:47:09,706 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times [2020-08-22 00:47:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:09,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262556425] [2020-08-22 00:47:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:10,537 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 00:47:10,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:47:10,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262556425] [2020-08-22 00:47:10,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:10,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:10,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851455308] [2020-08-22 00:47:10,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:10,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:10,673 INFO L87 Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 4 states. [2020-08-22 00:47:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:21,493 INFO L93 Difference]: Finished difference Result 13649 states and 20959 transitions. [2020-08-22 00:47:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:47:21,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 00:47:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:21,536 INFO L225 Difference]: With dead ends: 13649 [2020-08-22 00:47:21,537 INFO L226 Difference]: Without dead ends: 9125 [2020-08-22 00:47:21,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2020-08-22 00:47:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001. [2020-08-22 00:47:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9001 states. [2020-08-22 00:47:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions. [2020-08-22 00:47:21,936 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326 [2020-08-22 00:47:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:21,937 INFO L479 AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions. [2020-08-22 00:47:21,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:47:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions. [2020-08-22 00:47:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:47:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:21,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:47:21,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:47:21,958 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times [2020-08-22 00:47:21,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:21,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640035897] [2020-08-22 00:47:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:22,617 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-22 00:47:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:47:22,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640035897] [2020-08-22 00:47:22,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:22,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:22,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408849424] [2020-08-22 00:47:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:22,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:22,718 INFO L87 Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 4 states.